build(deps): update rustix requirement from 0.37.0 to 0.38.6

Updates the requirements on [rustix](https://github.com/bytecodealliance/rustix) to permit the latest version.
- [Release notes](https://github.com/bytecodealliance/rustix/releases)
- [Commits](bytecodealliance/rustix@v0.37.0...v0.38.6)

---
updated-dependencies:
- dependency-name: rustix
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Cargo.toml

@@ -16,7 +16,7 @@ exclude = [".gitignore", ".travis.yml"]
 
 [dependencies]
 # Private dependencies.
-rustix = { version = "0.37.0", features = ["fs"] }
+rustix = { version = "0.38.6", features = ["fs"] }
 
 [package.metadata.release]
 publish = false